diff --git a/tests/compile-fail/mut_reference.rs b/tests/compile-fail/mut_reference.rs
index 59c0aaf0c328..7480add8e68b 100644
--- a/tests/compile-fail/mut_reference.rs
+++ b/tests/compile-fail/mut_reference.rs
@@ -1,7 +1,7 @@
 #![feature(plugin)]
 #![plugin(clippy)]
 
-#![allow(unused_variable)]
+#![allow(unused_variables)]
 
 fn takes_an_immutable_reference(a: &i32) {
 }